RAM 2500 Truck 2WD L6-5.9L DSL Turbo VIN C (2002)
PROM - Programmable Read Only Memory: Customer Interest
PCM - Hard Starting/Idle Speed Fluctuations
NUMBER: 18-014-01
GROUP: Vehicle Performance
DATE: July 9, 2001
SUBJECT:
Performance Enhancement For Severe Cold Weather Environments
OVERVIEW:
This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software (59t7a)
NOTE:
THIS BULLETIN APPLIES TO ALL RAM TRUCKS EQUIPPED WITH A 5.9L 24-VALVE CUMMINS DIESEL ENGINE WITH A 49-STATE
EMISSIONS CALIBRATION AND AN AUTOMATIC TRANSMISSION.
MODELS:
1998-2002
(BR/BE)
Ram Truck
SYMPTOM/CONDITION:
Customer may experience hard starting and/or idle speed fluctuations.
Cummins 24-valve engines used with automatic transmissions can be severely effected by the use of sub-grade # 1 diesel fuel when ambient temperatures
are below 0°C (32°F), typically prevalent during the Winter months in Alaska, Northwestern Canada, and similar climates/temperatures elsewhere.
NOTE:
THIS CHANGE WILL HAVE NO EFFECT ON PERFORMANCE DURING WARM WEATHER OR WHEN STANDARD GRADE DIESEL
FUELS # 1 OR # 2 ARE USED.
NOTE:
VEHICLES WITH 49-STATE CERTIFICATION CAN APPLY THIS CALIBRATION CHANGE IF NEEDED. THE CALIBRATION CAN BE
CHANGED BACK TO THE ORIGINAL CALIBRATION IF DESIRED.
DIAGNOSIS PROCEDURES:
1.
Using the Diagnostic Scan Tool (DRBIII(R)) with the appropriate Diagnostic Procedures, verify all engine/transmission systems are functioning as
designed. If other DTC's are present, record them on the repair order and repair as necessary before proceeding further with this bulletin.
2.
If the condition above has been verified, perform the repair procedure.
PARTS REQUIRED:
EQUIPMENT REQUIRED:
NOTE:
